Last and first frost dates in Rouen

When is the last frost in Rouen?

The last frost in Rouen usually comes around 6 April: that is the median of 2016–2025, so in about half of those years the last night at or below 0 °C came later. Hardy crops start before it and frost-tender ones only after it: in the table below arugula can go into open ground from 16 March, while corn waits until 20 April. The first autumn frost follows around 21 November, about 229 days later: harvest or cover frost-tender crops before then.

When to sow and plant

Planting out: a week after the last frost once the soil is warm enough for the crop; frost-hardy crops three weeks before it; an unheated greenhouse three weeks earlier. Seedlings are sown so they are ready on that day. Each window starts on the Greenly calendar date and ends on the last day that still leaves the crop’s days to harvest (from its card) before the average first autumn frost, plus six weeks of picking for crops harvested over weeks (tomatoes, peppers, aubergines, cucumbers, courgettes, pumpkins, watermelons, beans) — our rule; earlier in the window is safer.

When the soil warms up in Rouen

The day the top 7 cm of soil first averages each temperature over a week, median of 2016–2025 (ERA5 via Open-Meteo). The soil reaches 10 °C 1 day after the last spring frost and 15 °C 38 days after it.

Frost dates near Rouen

Of the nearest cities on our list, the last spring frost ends earliest in Le Havre (14 February) and latest in Paris (8 April).

Seeds, seedlings and markets in Rouen

Within 15 km of Rouen OpenStreetMap lists 8 garden centres, 18 markets and 15 farm shops (collected 27 October 2026). The nearest garden centre to the city centre is E.Leclerc Jardi, 4 km away.

• E.Leclerc Jardi — garden centre
  Rue du Canal 40, 76380 Canteleu · Mon–Thu 09:00–19:15; Fri 09:00–19:30; Sat 09:00–19:00; Sun 10:00–12:30, 14:30–18:30 · 4 km · e-leclerc.com
• Place Saint-Marc — market
  public holidays, Mon–Sun 00:00–24:00 · 0 km
• Le Producteur Local — farm shop
  Tue–Sat 09:30–19:30 · 4 km · leproducteurlocal.fr
• Truffaut — garden centre
  Route de Neufchâtel 100, 76230 Isneauville · Mon–Sun 09:30–19:00 · 6 km · truffaut.com
• Marché de la Calende — market
  Place de la Calende, 76000 Rouen · Tue 08:00–18:00; Fri 08:00–18:00 · 0 km
• Le producteur local — farm shop
  Mon–Sat 09:30–19:00 · 4 km · montsaintaignan.leproducteurlocal.fr

• Where to buy seeds and seedlings in Rouen
• Selling your own harvest in France

Places: © OpenStreetMap contributors, ODbL.

Weather in Rouen by month

Average weather in Rouen over 2016–2025: the warmest month is July. Months that average 20 °C or more by day: June–September (20.2–23 °C). No month averages below 0 °C at night; the coldest nights, in January, average 1.6 °C. About 893 mm of rain falls in a year, on 150 days; December is the wettest month (100 mm) and August the driest (56 mm).

Average of the daily highs and lows, rain per month and days with at least 1 mm (ERA5 via Open-Meteo, the same grid cell as the frost dates).

Planted in autumn

From a month before the first autumn frost, so the roots grow before winter, to the late-planting limit on each crop’s page (about two weeks before the ground freezes, by ten years of weather).